基于仪表放大器的温度脉动仪的测量不确定度  

Measurement uncertainty of temperature pulsation meter based on instrument amplifier

作　　者：夏惠军[1] 杨欢 邬欣明 邓万涛 高伟翔 杨天志 李彪辉 XIA Huijun;YANG Huan;WU Xinming;DENG Wantao;GAO Weixiang;YANG Tianzhi;LI Biaohui(Southwest Institute of Technical Physics,Chengdu 610041,China)

机构地区：[1]西南技术物理研究所,成都610041

出　　处：《激光技术》2025年第2期296-300,共5页Laser Technology

摘　　要：表征大气湍流强度的关键参数一般是折射率结构常数,其由温度脉动仪测量得到。为了研究该常数的测量不确定度,基于温度脉动仪的工作原理,采用直径为10μm、电阻值为90Ω、温度变化系数为4.5×10^(-3)/K的钨丝作为测量传感器,获取温度差系综平均,并将同步监测到的压强、温度、距离等参数进行综合分析计算,得到折射率结构常数的测量不确定度。结果表明,当近地面层的大气折射率结构常数的真实值范围在10-13~10-16时,计算得到的折射率结构常数测量不确定度可控制在1%之内,具有较高的可信度。这一结果对于提高温度脉动仪的测量误差具有很大的作用,同时也为控制其测量不确定度提供了新的解决途径。The refractive index structure constant,as one of the key indicators characterizing atmospheric turbulence intensity,is measured by the temperature pulsation meter.Research on its measurement uncertainty is of significant importance.Based on the principle of the temperature pulsation meter,a tungsten filament with a diameter of 10μm,a resistance value of 90Ωand a temperature coefficient of variation of 4.5×10^(-3)/K were used as the measuring sensor to obtain the average temperature different coefficient.The measurement uncertainty of refractive index structure constant was derived from an integrated analysis of parameters including pressure,temperature and distance.Experimental data indicates that within the true value range of 10-13 to 10-16 near the ground,the calculated measurement uncertainty remains within 1%,demonstrating its reliability.The result is very effective for improving the measurement resolution of temperature pulsation meter,and it is also a new idea for controlling the measurement uncertainty of temperature pulsation meter.

关 键 词：大气光学 大气湍流 温度变化 测量不确定度 近地面 

分 类 号：TH744[机械工程—光学工程] P412[机械工程—仪器科学与技术]